Machine for sewing looped fabrics.



PIATENTED DEC. 26, 1.905.

0. LANGE. MACHINE FOR SEWING LOOPED FABRICS.

APPLIOATION FILED JULY 13, 1904.

3 SHEETSSHBET l.

PATENTED DEC. 26, 1905.

O. LANGE. MACHINE FOR SEWING LOOPBD FABRICS.

APPLIOATION FILED JULY 13, 1904.

3 SHEETS-SHEET 2.

314 uzwtoz witnesses N0. 808,390. PATENTED DEC. 26, 1905.

0. LANGE. MACHINE FOR SEWING LOOPED FABRICS.

APPLICATION FILED JULY 13, 1904.

3 SHEETS-SHEET 3.

UNITE STATES PATENT union.

OTTO LANGE, OF CAMDEN, NEW JERSEY.

MACHINE FOR SEWING LOOPED FABR|CS..

Specification of Letters Patent.

Patented Dec. 26, 1905.

Application filed July 13, 1904. Serial No. 216,379-

To all whom it may concern.-

' Be it known that I, OTTO LANGE, a citizen of the United States, residing in the city and county of Camden, State of New Jersey, have invented a new and useful Improvement in Machines for Sewing Looped Fabrics, of which elevations of certain parts of the machine in different positions from those shown in Fig. 1. Fig. 5 is a detail, partly in elevation and partly in section, showing the needle, the two pieces of fabric, their retaining-pin, and the looper in the position they assume before starting the machine. Fig. 6 is a detail of the looper with the needle in cross-section. Fig. 7 shows the position of the parts after the needle has pierced the fabrics. Fig. 8 is a detail view showing the looper above the needle. Fig. 9 is a detail similar to Fig. 7, showing the needle and looper in a different position with relation to each other. Fig. 10 is a view similar to Fig. 8, showing another position of the needle and looper. Fig. 11 is a similar view with the looper taking hold of the thread. Fig. 12 shows the position the parts assume when the loop is formed. Fig. 13 is a top plan with the fabrics pierced by the needle. Fig. 14 is a perspective view showing the position of the parts after the needle has completed its return movement and again pierced the fabric and passed through the loop. Fig. 15 shows the loop slipped off the looper and on the needle. 4 16 is a detail in perspective, showing thelooper and its carrier detached. Fig. 17 is a perspective View of the guide and its guard. Fig. 18 represents a plan view of stitches as produced by the machine. Fig. 19 is a perspective detail showing the relation of the guard on the guide and the pins and needle.

Fig. 20 is a detail in top plan. Fig. 21 is a of my invention applied thereto, is of wellknown construction. Y

2 designates a shaft journaled in the frame 3 of the machine and driven by any wellknown means. The shaft 2 is provided with the cam 4 and the eccentric 5.

Fulcrumed on a stud 6 in the frame 3 is a lever 7, which carries at one end the needle 8 and at the other end the grooved rocker 9, which engages with the flanged rim of the eccentric, thus imparting intermittent motion to said lever.

Rigidly secured to the stud 6 is a hanger 10, provided with an adjusting-screw 11, the latter bearing against the sleeve 13, which is mounted on the stud 12 and provided at its ends with arms 14 and 15, adjustably fitted therein and held in position by screws 16 and 17, respectively, said sleeve 13 being held against the screw 11 by a spring 18. The arm 15 has a limb 15*, with which the thread 19 is adapted to be brought in contact, (see Fig. 1,) and the arm 14 has a limb 14, which is adapted to be engaged by the eccentric 5, whereby, owing to said eccentric and the spring 18, rocking motions may be imparted to said sleeve and the limb 15 placed in different positions relatively to the tension to be imparted to the thread.

Secured to the lever 7 is a guide 20, having eyes 21 and 22, through which the thread 19 is directed in its passage to the needle 8.

23 designates a tension device for the thread 19, the same being of usual construction. Mounted on the frame 3 by a ball-and-socket joint 24 is the rising-and-falling and laterallymoving arm 25, on the forward end of which is adjustably fitted a looper 26, held in position thereon by the screw 27. The arm 25 is provided with rollers 28 and 29, which are held in contact with the cam 4 by a spring 30, so ghat said arm may receive motions as aforesa1 Secured to the frame 3 adjacent to the looper 26 is a guide 31, which prevents the thread 19 from slipping from said looper at improper times.

In the present instance the pin-plate 1 has intermittent motion imparted to it by means of the eccentric 32 on the shaft 2, dog or pawl 33, ratchet 34, and connected gearing usual in machines of the class.

The operation is as follows: The thread 19 is passed through the tension device 23, eyes 21 and 22, and then through the eye of the needle 8. Assuming the needle 8 and parts adjacent thereto to be in the positions seen in Fig. 5 before the machine is put in operation, it is apparent that when the machine is started the needle 8 is caused to move in the direction indicated by the arrow a. (See Figs. 3 and 5.) When the needle 8 has pierced the two pieces 35 of fabric primarily fastened upon the pins 36 in the rotary plate 1, as seen in Fig. 7, it will be noted that the looper 26 is above the needle 8. When the needle 8 has almost completed its forward movement, the looper 26 is lowered by the working face 38 of the cam 4, during which time a side movement is imparted to said looper by the working face 37 of the cam 4, which combined movements cause the looper 26 and the needle8 to be located relatively to each other, as seen in Figs. 9 and 10. When the needle 8 starts to move backward by the action of the lever 7, the depressed working face 39 of the cam 5 permits the spring 30 to contract and elevate the looper 26 to a point above the needle 8, during which time the working face 40 of the eccentric causes the looper 26 to move toward the needle 8, and which combined movements cause said looper to move in the direction indicated by the arrow 5 in Fig. 11, (see also Fig. 12,) and thus cause said looper 26 to take hold of the thread 19 by passing under the same, so that a loop 41 is formed on the looper 26 by reason of the upward and forward movements of said looper. (See Fig. 12.) The needle 8 then completes its backward movement, after which it'again advances and passes through the loop 41 on the looper 26, as seen in Fig. 14, after which said looper 26 is moved away from theneedle 8by the cam 4 and in the direction indicated by the arrow 0 in Fig. 14, thus causing the loop 41 to slip off the looper 26 and encircle the needle 8, as seen in Fig. 15. When the needle 8 returns to the position seen in Fig. 5, the loop 41 thereon (seen in Fig. 15) slips off said needle and adds one loop to the series 42 of loops seen in Figs. 14, 15, and 18. That portion of the thread 19 between the eye of the needle 8 and the knit fabric 35 becomes slack and forms a loop, as seen in Fig. 13, when said needle is moving backward, and thus permits the looper 26 to take hold of the thread 19 at this point. IVhen the needle 8 is advancing, the arm 15 is in the position seen in Fig. 2, it being evident that the thread 19 becomes slack as the distance between the eye 22 and the looper 26 decreases. When the needle 8 starts to move backward, the eccentric 5 leaves the limb 14, whereupon the sleeve 13 is brought fromthe position seen in Fig. 4 to that seen in Fig. 3 and causes the limb 15 to pull upon the thread 19, so as to tighten the loop 41 on the needle 8 before said loop slips therefrom, and also to draw a portionof thread 19 from a spool and through the tension 23 prior to again being formed into a loop, as hereinbefore described. When a looper 26 becomes worn out, it may in easily removed by simply loosening the screw 43 and replaced by a new one. (See Fig. 16.)

By the employment of the sleeve 13, the adjustable arms 14 and 15, and the eccentric 5 a highly-elastic stitch may be produced. On the guide 31 is the guard 44, (see Fig. 17,) the same preventing the series 42 of loops from coming in contact with the pins 36, it being understood that more or less of such loops exist between articles to be sewed and which follow each other after being suspended from the pins 36.

The limb 14 has a roller thereon for frictional contact with the eccentric, the effect of which is evident.

Various changes may be made in the details of construction shown without departing from the general spirit of my invention, and I do not, therefore, desire to be limited in each case to the same.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a machine for sewing looped fabrics,

the combination with the needle-carrying lever and a cam and rocker cooperating therewith, of a tension device movable with relation to said lever and consisting of a pair of arms, and a rocking piece with which said arms are connected, means cooperating with said tension device to tension the thread, means including a limb on one of said arms for operating said piece in one direction, and means for moving said piece in the opposite direction.

2. In a machine for sewing looped fabrics, the combination with a needle-carrying lever and a cam and a rocker cooperating therewith, of a tension device movable with relation to said lever and consisting of a pair of arms, and a rocking piece with which said arms are connected, and a thread-guide movable with said lever, means for operating said piece in opposite directions, and an adjusting-screw and means for carrying said screw, said screw being adapted to have said rocking piece abut thereagainst and adjust the throw thereof.

3. In a machine for sewing looped fabrics, a looper mounted for downward, upward and lateral movements, an eccentric, a lever operatively connected with said eccentric, a hanger supported from the pivot of said lever, a rockable member mounted on said hanger and provided with a limb having a portion disposed in the path of said eccentric thread-engaging means on the other end of said rockable member, a spring acting on said rockable member, means cooperating with said thread-engaging means and means for actuating said looper.

4. In a machine for sewing looped fabrics, a looper mounted for downward, upward and lateral movements, an eccentric, a lever operatively connected with said eccentric, a hanger supported from the pivot of said lever, a rockable member mounted on said hanger and provided with a limb having a portion disposed in the path of said eccentric, a spring acting on said rockable member, means for actuating said looper, a second limb carried by said rockable member, and a tension device carried by said lever in the path of said second limb.

5. In a machine for sewing looped fabrics, a looper-arm mounted for downward, upward and lateral movements, a ball-and-socket joint for said arm, an eccentric, a lever operatively connected with said eccentric,'a hanger supported from the pivot of said lever, a rockable member mounted on said hanger and provided with a limb having a portion disposed in the path of said eccentric thread-engaging means on the other end of said rockable member, a spring acting on said rockable member, means cooperating with said thread-engaging means and means for actuating said looper-arm.

6. In a machine for sewing looped fabrics,

a lever, a needle carried by the same, means for operating said lever in opposite directions, a rocking arm, a tension device proper, resilient thread-guides on said lever, a limb on said rocking arm, means on said limb in the path of the lever-operating means for operating said arm, said arm being intermediate of said needle and tension device and adjacent to said guides and a thread-engaging limb.

7. In a machine for sewing looped fabrics, a looper mounted for downward, upward and lateral movements, a loop-guide adjacent to the said looper and fixedly secured to the frame, a rotary pin-plate and a guard on said guide located above the pins for preventing the loops from coming in contact with the pins of the rotary plate of the machine.

OTTO LAN GE.

Witnesses:

J OHN A. WIEDERSHE'IM, WM. OANER WIEDERSEIM. 

